package kr.hkit.powerjava.chapter24.work2.dao;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;


import kr.hkit.powerjava.chapter24.work.vo.Student;

public class StudentDao implements InterfaceDao<Student> {
	private ArrayList<Student> lists;
	private final String filePath= "studentList.dat";


	@Override
	public void insertItem(Student item) {
		if (!lists.contains(item)) {
			lists.add(item);
		}
		
	}
	@Override
	public void deleteItem(Student item) {
		lists.remove(item);
		
	}
	@Override
	public void updateItem(Student item) {
		lists.set(lists.indexOf(item), item);
		
	}
	@Override
	public Student searchItem(Student item) {
		Student searchValue=null;
		if(lists.contains(item))
			searchValue=lists.get(lists.indexOf(item));
		return searchValue;
	}
	@Override
	public void prnItemList(Comparator<Student> comp) {
		if (comp ==null){
			Collections.sort(lists);
		}else{
			Collections.sort(lists,comp);
		}
		for (Student std :lists){
			System.out.println(std);
		}
		
	}
	@SuppressWarnings("unchecked")
	@Override
	public void loadFile() {
		ObjectInputStream ois = null;
		try {
			ois = new ObjectInputStream(new BufferedInputStream(
					new FileInputStream(filePath)));
			lists = (ArrayList<Student>) ois.readObject();
		} catch (FileNotFoundException e) {
			try {
				new File(filePath).createNewFile();
				lists = new ArrayList<>();
			} catch (Exception e1) {
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (ois != null)
				try {
					ois.close();
				} catch (Exception e) {
				}
		}
	}
	@Override
	public void saveFile() {
		ObjectOutputStream oos = null;
		try {
			oos = new ObjectOutputStream(new BufferedOutputStream(
					new FileOutputStream(filePath)));
			oos.writeObject(lists);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (oos != null)
				try {
					oos.close();
				} catch (Exception e) {
				}
		}

	}

}
		

